Construction laborers do a variety of tasks at the construction sites of buildings, highways, bridges, and other public and private building projects. Depending on the type of project, construction laborers may carry materials used by craft workers, clean up debris, operate cement mixers, or lay and seal together lengths of sewer pipe, among other duties. They also are involved in hazardous waste/environmental remediation. Approximately 887,580 construction laborers are employed in the United States.